Vaillant ecoTEC plus 937 Operating Manual

Also see for ecoTEC plus 937: Operating manual Instructions for installation and servicing Instructions and maintenance instructions

Contents

Vaillant ecoTEC plus 937 Operating Manual Manual pdf 10 page image

Operating instructions ecoTEC plus 937 / 0020031573_02104.5 Heating operationThe boiler can only be used if the heating system haswater in it (see Section 4.2.2).4.5.1 Setting the flow temperature21Fig. 4.11 Setting the flow temperatureSet the flow temperature by using the knob (1).We recommend the following settings:– Left-hand setting in Spring and Autumn,– Mid-position setting in reasonably cold weather– Right-hand setting in very cold weatherThe set value is shown in the display (2) during the set-ting process. After approx. 3 seconds the display returnsto standard mode (the current heating flow tempera-ture).Normally you can adjust the knob (1) continuously up toa flow temperature of 75 °C.However, if higher temperatures are required this can beachieved by adjusting the boiler parameter d.71 (a quali-fied installer should make this change) up to a maximumof 85 °C.4.5.2 Switching heating mode off (summer mode)1Fig. 4.12 Switching off heating (summer operation)You can switch off the heating in summer without swit-ching off the hot water supply.• Turn the rotary knob (1) for setting the heating flowtemperature all the way to the left.4.5.3 Setting a room thermostat or weather com-pensator21Fig.4.13 Setting a room thermostat or weather compensator• Adjust the room thermostat (1) and/or the radiatorthermostatic valves (2) in accordance with the opera-ting instructions for these accessories.h NoteVaillant supplies thermostats and time control-lers which provide exact and economic roomtemperature regulation for improved operatingconvenience.The boiler thus operates automatically according to theset parameters for the heating system (the ecoTEC com-bination boiler also provides hot water if required).After operation is stopped the pump runs on for a shortperiod to allow the heat to be completely dissipatedfrom the unit.h NoteThe boiler is fitted with a control unit whichprevents unnecessary and energy-wastingshort-term switching on and off. For this reasonthere may be a slight delay when setting a hig-her temperature on the thermostat before theboiler switches on.4.6 Status displays (for maintenance and servi-cing by the engineer)12Fig. 4.14 Status displays4 Operation